water vapor

noun

: water in a vaporous form especially when below boiling temperature and diffused (as in the atmosphere)

Examples of water vapor in a Sentence

Recent Examples on the Web

As that ice particle falls, more and more minuscule bits of water vapor freezes to it. —Laura Kiniry, Popular Science, 22 Jan. 2026

More bad news The total amount of water vapor in the air is still increasing. —Mark Gongloff, Mercury News, 17 Jan. 2026

Its systems harvest water vapor from the air and use it for water production and humidity regulation, offering a dual benefit in hot, arid climates. —Atharva Gosavi, Interesting Engineering, 16 Jan. 2026

By modeling both together, the new analysis shows how water vapor, clouds and chemical reactions interact as material slowly circulates from deep, hot layers to cooler higher altitudes, according to the statement. —Samantha Mathewson, Space.com, 16 Jan. 2026

Word History

First Known Use

15th century, in the meaning defined above

Rhymes for water vapor

• caper
• paper
• raper
• scraper
• shaper
• taper
• newspaper
• notepaper
• sandpaper
• skyscraper
• wallpaper
• wastepaper

Kids Definition

water vapor

noun

: water in a gaseous form especially when below boiling temperature and spread through the atmosphere

Medical Definition

water vapor

noun

: water in a vaporous form especially when below boiling temperature and diffused (as in the atmosphere)